<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no">
		<title></title>
		<style>
			* {
				margin: 0px;
				padding: 0px;
				box-sizing: border-box;
				list-style: none;
			}
			
			.main {
				max-width: 100%;
				margin: auto;
			}
			
			.header {
				background-color: #ababab;
				height: 50px;
				display: flex;
				justify-content: space-between;
				align-items: center;
			}
			
			.header>h2 {
				flex-grow: 1;
				text-align: center;
			}
			
			.header>button {
				border: none;
				outline: none;
				background-color: rgba(0,0,0,0);
			}
		</style>
	</head>
	<body>
		<main class="main">
			<header class="header">
				<a><</a>
				<h2>首页</h2>
				<button>搜索</button>
			</header>
		</main>
	</body>
</html>